Graco Dura-Flo 750 Bedienungsanleitung

308–417

Rev. C

Supersedes B

First

choice when

quality counts.



05241

05242

Model

236–459

Model 237–366

INSTRUCTIONS-PARTS

LIST

INSTRUCTIONS

This

manual contains important

warnings and information.

READ AND KEEP FOR REFERENCE.

CARBON STEEL

Dura-Flo

750 Pumps

With

Severe-Duty Rod and Cylinder

Refer

to page 2 for a List of Models and the T

able of Contents.

GRACO INC. P.O. BOX 1441

MINNEAPOLIS, MN

55440–1441

COPYRIGHT

1995, GRACO INC.

Graco

Inc. is registered to I.S. EN ISO 9001

 

List

of Models

Pump

Part No.

and Series

Pump Model

Displacement

Pump Part No.

and Series

Ratio

Maximum Fluid

orking Pressure

Maximum Air

Input Pressure

236–459,

Series A

Kingt238–1

16,

Series A

68:1

42.2 MPa, 422 bar

(6120 psi)

0.63 MPa, 6.3 bar

(90 psi)

237–364,

Series A

Reduced Icing

Quiet King

238–1

16,

Series A

68:1

42.2 MPa, 422 bar

(6120 psi)

0.63 MPa, 6.3 bar

(90 psi)

237–366,

Series A

Bulldogr

236–455,

Series A

33:1

22.8 MPa, 228 bar

(3300 psi)

0.7 MPa, 7 bar

(100 psi)

237–582,

Series A

Reduced Icing

Quiet Bulldog

236–455,

Series A

33:1

22.8 MPa, 228 bar

(3300 psi)

0.7 MPa, 7 bar

(100 psi)

237–370,

Series A

Bulldogr

with riser tube

236–455,

Series A

33:1

22.8 MPa, 228 bar

(3300 psi)

0.7 MPa, 7 bar

(100 psi)

Table

of Contents

Warnings 3.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation 7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operation/Maintenance 10

. . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting

Chart

13.

. . . . . . . . . . . . . . . . . . . . . . . .

Service 14

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Required Tools 14.

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Disconnecting

the Displacement Pump

14.

. . . . . .

Reconnecting

the Displacement Pump

14.

. . . . . .

Displacement

Pump Service

16.

. . . . . . . . . . . . . . .

Parts

Drawings and Parts Lists

21.

. . . . . . . . . . . . . . . . .

Pump

Assemblies

21.

. . . . . . . . . . . . . . . . . . . . . . . .

Displacement

Pump 238–1

16 24.

. . . . . . . . . . . . . .

Displacement

Pump 236–455

26.

. . . . . . . . . . . . . .

Technical

Data

28.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dimensions 31

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mounting

Hole Layout

31.

. . . . . . . . . . . . . . . . . . . . . . . . .

Warranty 32

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Graco

Phone Number

32.

. . . . . . . . . . . . . . . . . . . . . . . . .

 

Symbols

Warning Symbol

WARNING

his

symbol alerts you to the possibility of serious

injury or death if you do not follow the instructions.

Caution Symbol

CAUTION

This

symbol alerts you to the possibility of damage to

or destruction of equipment if you do not follow the

instructions.

WARNING

INSTRUCTIONS

EQUIPMENT MISUSE HAZARD

Equipment

misuse can cause the equipment to rupture or malfunction and result in serious injury

This equipment is for professional use only

Read all instruction manuals, tags, and labels before operating the equipment.

Use the equipment only for its intended purpose. If you are uncertain about usage, call your Graco

distributor.

Do not alter or modify this equipment. Use only genuine Graco parts and accessories.

Check equipment daily

. Repair or replace worn or damaged parts immediately

Do not exceed the maximum working pressure of the lowest rated system component. Refer to the

echnical Data

on pages 28 and 29 for the maximum working pressure of this equipment.

Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the

Tech-

nical Data

section of all equipment manuals. Read the fluid and solvent manufacturer

’

s warnings.

Do not use hoses to pull equipment.

Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose

Graco hoses to temperatures above 82

C (180

F) or below –40

C (–40

_F).

ear hearing protection when operating this equipment.

Do not lift pressurized equipment.

Comply with all applicable local, state, and national fire, electrical, and safety regulations.

 

WARNING

INJECTION HAZARD

Spray

from the gun, hose leaks, or ruptured components can inject fluid into your body and cause

extremely serious injury

, including the need for amputation. Fluid splashed in the eyes or on the skin

can also cause serious injury



Fluid injected into the skin might look like just a cut, but it is a serious injury

Get immediate medi

cal attention.



Do not point the gun at anyone or at any part of the body



Do not put your hand or fingers over the spray tip.



Do not stop or deflect leaks with your hand, body

, glove or rag.



Do not “blow back” fluid; this is not an air spray system.



Always have the tip guard and the trigger guard on the gun when spraying.



Check the gun dif

fuser operation weekly

. Refer to the gun manual.



Be sure the gun trigger safety operates before spraying.



Lock the gun trigger safety when you stop spraying.



Follow the

Pressure Relief Procedure

on page 10 whenever you: are instructed to relieve pres

sure; stop spraying; clean, check, or service the equipment; and install or clean the spray tip.

T

ighten all fluid connections before operating the equipment.



Check the hoses, tubes, and couplings daily

. Replace worn, damaged, or loose parts immediately

Permanently coupled hoses cannot be repaired; replace the entire hose.



Use only Graco approved hoses. Do not remove any spring guard that is used to help protect the

hose from rupture caused by kinks or bends near the couplings.

MOVING

ARTS HAZARD

Moving

parts, such as the air motor piston, can pinch or amputate your fingers.



Keep clear of all moving parts when starting or operating the pump.



Before servicing the equipment, follow the

Pressure Relief Procedure

on page 10 to prevent the

equipment from starting unexpectedly

308-417 5

WARNING

FIRE AND EXPLOSION HAZARD

Improper

grounding, poor ventilation, open flames or sparks can cause a hazardous condition and

result in a fire or explosion and serious injury



Ground the equipment and the object being sprayed. Refer to

Grounding

on page 7.



If there is any static sparking or you feel an electric shock while using this equipment,

stop spray-

ing immediately

Do not use the equipment until you identify and correct the problem.



Provide fresh air ventilation to avoid the buildup of flammable fumes from solvents or the fluid

being sprayed.



Keep the spray area free of debris, including solvent, rags, and gasoline.



Electrically disconnect all equipment in the spray area.



Extinguish all open flames or pilot lights in the spray area.



Do not smoke in the spray area.



Do not turn on or of

f any light switch in the spray area while operating or if fumes are present.



Do not operate a gasoline engine in the spray area.

TOXIC FLUID HAZARD

Hazardous

fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin,

inhaled, or swallowed.



Know the specific hazards of the fluid you are using.



Store hazardous fluid in an approved container

. Dispose of hazardous fluid according to all local,

state and national guidelines.



Always wear protective eyewear

, gloves, clothing and respirator as recommended by the fluid and

solvent manufacturer

6 308-417

Notes

 

Installation

General Information

NOTE:

Reference numbers and letters in parentheses

in the text refer to the callouts in the figures and the

parts drawing.

NOTE:

Always use Genuine Graco Parts and Acces

sories, available from your Graco distributor

. Refer to

the Product Data Sheet, Form No. 305–722 for Bulldog

Pumps and Form No. 305–723 for King Pumps. If you

supply your own accessories, be sure they are ade

quately sized and pressure rated for your system.

Grounding

WARNING

FIRE AND EXPLOSION HAZARD

Before operating the pump, ground the

system as explained below

. Also read

the section

FIRE AND EXPLOSION

HAZARD

on page 5.

Pump:

use a ground wire and clamp. See Fig. 1.

Loosen the grounding lug locknut (W) and washer

(X). Insert one end of a 1.5 mm



(12 ga) minimum

ground wire (Y) into the slot in lug (Z) and tighten

the locknut securely

. Connect the other end of the

wire to a true earth ground. Order Part No.

237–569 Ground Wire and Clamp.

Fig. 1

0864

Air and fluid hoses:

use only electrically conductive

hoses.

Air compressor:

follow manufacturer

’

s recommen

dations.

Spray gun:

ground through connection to a prop

erly grounded fluid hose and pump.

Fluid supply container:

follow your local code.

Object being sprayed:

follow your local code.

Solvent pails used when flushing:

follow your local

code. Use only metal pails, which are conductive,

placed on a grounded surface. Do not place the

pail on a nonconductive surface, such as paper or

cardboard, which interrupts the grounding continu

ity.

o maintain grounding continuity when flushing or

relieving pressure

, hold a metal part of the spray

gun firmly to the side of a grounded

metal

pail,

then trigger the gun.

System Accessories

Fig.

2 is only a guide for selecting and installing sys

tem components and accessories. Contact your Graco

distributor for assistance in designing a system to suit

your particular needs.

Air and Fluid Hoses

Be sure all air hoses (H) and fluid hoses (N and P) are

properly sized and pressure-rated for your system.

Use only electrically conductive hoses. Fluid hoses

must have spring guards on both ends. Use a whip

hose (P) and a swivel (R) between the main fluid hose

(N) and the gun (S) to allow freer gun movement.

Mounting Accessories

Mount the pump (A) to suit the type of installation

planned. Fig. 2 illustrates a wall mount system. Pump

dimensions and the mounting hole layout are shown

on page 31.

If you are using a floor stand, refer to its separate

manual for installation and operation instructions.

 

Installation

System Accessories (continued)

WARNING

bleed-type master air valve (E) and a fluid drain

valve (M) are required in your system. These

accessories help reduce the risk of serious injury

including fluid injection and splashing of fluid in the

eyes or on the skin, and injury from moving parts if

you are adjusting or repairing the pump.

The bleed-type master air valve relieves air trapped

between this valve and the pump after the air is

shut of

f. T

rapped air can cause the pump to cycle

unexpectedly

. Locate the valve close to the pump.

Order Part No. 107–141.

The fluid drain valve assists in relieving fluid pres

sure in the displacement pump, hose, and gun.

riggering the gun to relieve pressure may not be

suf

ficient. Order Part No. 210–658.

Air Line Accessories

Install the following accessories in the locations shown

in Fig. 2, using adapters as necessary:

An

air line lubricator (D)

provides automatic air

motor lubrication.

A

bleed-type master air valve (E)

is required in

your system to relieve air trapped between it and

the air motor when the valve is closed (see the

WARNING

above). Be sure the bleed valve is eas

ily accessible from the pump, and is located

downstream

from the air regulator

An

air regulator (F)

controls pump speed and out

let pressure by adjusting the air pressure to the

pump. Locate the regulator close to the pump, but

upstream

from the bleed-type master air valve.

A

pump runaway valve (C

) senses when the

pump is running too fast and automatically shuts

f the air to the motor

. A pump which runs too fast

can be seriously damaged.



An air manifold (G)

has a 3/4 npsm(f) swivel air

inlet. It mounts to the pump support bracket, and

provides ports for connecting lines to air-powered

accessories.

An

air line filter (J) removes harmful dirt and

moisture from the compressed air supply

. Also,

install a

drain valve (W)

at the bottom of each air

line drop, to drain of

f moisture.

A second

bleed-type air valve (K)

isolates the air

line accessories for servicing. Locate upstream

from all other air line accessories.

Fluid Line Accessories

Install the following accessories in the locations shown

in Fig. 2, using adapters as necessary:

A fluid filter (L)

with a 60 mesh (250 micron)

stainless steel element, to filter particles from the

fluid as it leaves the pump.

A fluid drain valve (M),

which is required in your

system, helps relieve fluid pressure in the hose

and gun (see the

WARNING

at left).

A gun (S)

dispenses the fluid. The gun shown in

Fig. 2 is an airless spray gun for light to medium

viscosity fluids.



A gun swivel (R)

allows freer gun movement.

A suction kit (T)

allows the pump to draw fluid

from a supply container

308-417 9

Installation

04496

Fig. 2

KEY

APump

BWall

Bracket

Pump Runaway V

alve

Air Line Lubricator

EBleed-T

ype Master Air V

alve

(required, for pump)

Pump Air Regulator

Air Manifold

Electrically Conductive

Air Supply Hose

Air Line Filter

KBleed-T

ype Master Air V

alve

(for accessories)

Fluid Filter

Fluid Drain V

alve (required)

Electrically Conductive

Fluid Supply Hose

Fluid Whip Hose

Gun Swivel

Airless Spray Gun

Suction Kit

Ground Wire and Clamp

(required; see page 7

for installation instructions)

Air Line Drain V

alve

TYPICAL INSTALLATION

MAIN

AIR LINE

 

Operation/Maintenance

Pressure Relief Procedure

WARNING

INJECTION

HAZARD

The system pressure must be manually

relieved to prevent the system from

starting or spraying accidentally

. Fluid

under high pressure can be injected through the

skin and cause serious injury

. T

o reduce the risk of

an injury from injection, splashing fluid, or moving

parts, follow the

Pressure Relief Procedure

whenever you:

are instructed to relieve the pressure,

stop spraying,

check or service any of the system equipment,

or install or clean the spray tips.

Lock the gun trigger safety

Shut of

f the air supply to the pump.

Close the bleed-type master air valve (required in

your system).

Unlock the gun trigger safety

Hold a metal part of the gun firmly to the side of a

grounded metal pail, and trigger the gun to relieve

pressure.

Lock the gun trigger safety

Open the drain valve (required in your system),

having a container ready to catch the drainage.

Leave the drain valve open until you are ready to

spray again.

If you suspect that the spray tip or hose is completely

clogged, or that pressure has not been fully relieved

after following the steps above,

very slowly

loosen the

tip guard retaining nut or hose end coupling and relieve

pressure gradually

, then loosen completely

. Now clear

the tip or hose.

Packing Nut/Wet-Cup

Before

starting, fill the packing nut (8) 1/3 full with

Graco Throat Seal Liquid (TSL) or compatible solvent.

See Fig. 3.

WARNING

o reduce the risk of serious injury whenever you

are instructed to relieve pressure, always follow the

Pressure Relief Procedure

at left.

The packing nut is torqued at the factory and is ready

for operation. If it becomes loose and there is leaking

from the throat packings, relieve pressure, then torque

the nut to 61–75 N

m (45–55 ft-lb) using the supplied

wrench (1

10). Do this whenever necessary

. Do not

overtighten the packing nut.

05242

Fig. 3

110

Model

237–366

Shown

1Torque

to 61–75 N

(45–55 ft-lb)

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